Study on enhanced ozonation degradation of para-chlorobenzoic acid by peroxymonosulfate in aqueous solution

Jing, Cong; Wen, Gang; Huang, Tinglin; Deng, Linyu; Ma, Jun

doi:10.1016/j.cej.2014.11.086

Cited by 96 publications

(23 citation statements)

References 26 publications

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“…both HO ⋅ and SO ⋅− 4 could be scavenged and quenched by ethanol (EtOH) (Cong, Wen, Huang, Deng, & Ma, 2015). From Figure 6a, it was clear that the ATZ degradation efficiency decreased to 65.0% and 8.0% with 50 mM TBA and EtOH, respectively.…”

Section: Research Articlementioning

confidence: 96%

Degradation of atrazine in aqueous solution through peroxymonosulfate activated by Co‐modified nano‐titanium dioxide

Cai

Yin

et al. 2020

Water Environment Research

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Peroxymonosulfate (PMS) heterogeneous activation by Co3O4‐modified catalyst has shown significant implications to generate free radicals for organic pollutants degradation in water. In this study, PMS heterogeneous activation was applied to degrade atrazine (ATZ) using Co3O4‐mediated titanium dioxide nanoparticles (Co3O4/TiO2 NPs), which were synthesized by sol‐gel method. Firstly, characteristics of the fresh and used Co3O4/TiO2 NPs were analyzed via SEM, TEM, XRD, EDS, and XPS techniques. Then, the influences of several key parameters (i.e., Co3O4/TiO2 NPs dose (0.02–0.3 g/L), PMS dose (0–0.6 mM), initial pH (3.0–11.0), and co‐existing anions) on the ATZ degradation were investigated systematically. Besides, control systems were set up to verify the high efficiency of Co3O4/TiO2 NPs. In addition, the radical scavenging experiments revealed that sulfate and hydroxyl radicals were generated in the Co3O4/TiO2‐PMS system, while sulfate radicals were the dominant reactive species responsible for ATZ degradation. Furthermore, the stability and reusability of the Co3O4/TiO2 NPs were investigated after four consecutive experiments. Based on the identified products, possible degradation pathways of ATZ in the Co3O4/TiO2‐PMS system were proposed. Finally, the possible reaction mechanism of Co3O4/TiO2‐PMS system was proposed according to the comprehensive analysis. Findings of this study provided useful information for the application of Co3O4/TiO2 NPs in recalcitrant organic contaminants degradation. Practitioner points Co3O4/TiO2 NPs were synthesized via the simple sol‐gel method. Co3O4/TiO2 NPs possessed excellent catalytic performance for PMS to eliminate ATZ. Sulfate radicals play a dominant role in the degradation of ATZ. ATZ degradation pathways and reaction mechanism in the system were proposed.

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Section: Research Articlementioning

confidence: 96%

Degradation of atrazine in aqueous solution through peroxymonosulfate activated by Co‐modified nano‐titanium dioxide

Cai

Yin

et al. 2020

Water Environment Research

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“…2 However, the performance of the process depends on multiple operating variables, such as anions, natural organic matter (NOM), solution pH, external energy (e.g., UV light, electric eld and ultrasound), etc. [3][4][5] For this reason, the traditional onefactor-at-a-time approach to optimization is time and regent extensive, and it is oen unable to yield globally optimal operating conditions.…”

Section: Introductionmentioning

confidence: 99%

“…Acid orange II (AO II) dye, a commercially azo dye with ideal molecule structure, was chosen as a pollutant model. The main objectives are: (1) to evaluate the suitability of DSD approach in optimizing the operating parameters of Co 2+ /PMS system; (2) to identify the signicant main and interaction effects involved in the reaction system; (3) to check the possible interactions between the ve anions during the in situ chemical oxidations; and (4) to explore the oxidation pathway of AO II in Co 2+ /PMS/NaCl system via quantum chemistry calculation and LC/MS technique. This study was novel, because nine variables of Co 2+ /PMS system were initially included in a single experimental matrix.…”

Section: Introductionmentioning

confidence: 99%

Application of a novel definitive screening design to in situ chemical oxidation of acid orange-II dye by a Co²⁺/PMS system

et al. 2018

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“…Transition metal ions catalysts such as Co(II), Cu(II), Mn(II), Ni(II) and Ce(III) are toxic and difficult to recycle. 16 In the study of Yang's group, granular activated carbon (GAC) was used as a catalyst to activate peroxymonosulfate (PMS) to degrade azo dye Acid Orange 7 (AO7) in aqueous solution. For example, CuFe 2 O 4 magnetic nanoparticles have been suggested as efficient heterogeneous catalysts for PMS activation.…”

Section: Introductionmentioning

confidence: 99%

Metal-free activation of peroxymonosulfate by g-C₃N₄ under visible light irradiation for the degradation of organic dyes

et al. 2015

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Semiconducting carbon nitride materials (g-C 3 N 4 ) were investigated as metal-free catalysts for the activation of peroxymonosulfate (PMS) under visible light irradiation to degrade organic dyes in aqueous solution. X-ray diffraction, scanning electron microscopy, N 2 adsorption/desorption isotherms, Fourier transform infrared spectroscopy and X-ray photoelectron spectroscopy were used to characterize the properties of the material. The effect of several parameters including the concentration of catalyst, PMS and organic dye, and initial solution pH on its catalytic activity was also investigated. It was found that the obtained g-C 3 N 4 can effectively activate PMS under visible light irradiation to generate strong sulfate radicals which was highly active for Acid Orange 7 (AO7) and other organic dyes degradation. The catalyst also presented a long-term stability during multiple runs. Based on intermediate detections, the degradation pathway of AO7 in the g-C 3 N 4 /PMS/Vis system was proposed. This study demonstrated a promising approach for the activation of green oxidant, PMS, by the newly-developed polymer photocatalysts for environmental remediation and oxidation catalysis.

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Study on enhanced ozonation degradation of para-chlorobenzoic acid by peroxymonosulfate in aqueous solution

Cited by 96 publications

References 26 publications

Degradation of atrazine in aqueous solution through peroxymonosulfate activated by Co‐modified nano‐titanium dioxide

Degradation of atrazine in aqueous solution through peroxymonosulfate activated by Co‐modified nano‐titanium dioxide

Application of a novel definitive screening design to in situ chemical oxidation of acid orange-II dye by a Co²⁺/PMS system

Metal-free activation of peroxymonosulfate by g-C₃N₄ under visible light irradiation for the degradation of organic dyes

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Study on enhanced ozonation degradation of para-chlorobenzoic acid by peroxymonosulfate in aqueous solution

Cited by 96 publications

References 26 publications

Degradation of atrazine in aqueous solution through peroxymonosulfate activated by Co‐modified nano‐titanium dioxide

Degradation of atrazine in aqueous solution through peroxymonosulfate activated by Co‐modified nano‐titanium dioxide

Application of a novel definitive screening design to in situ chemical oxidation of acid orange-II dye by a Co2+/PMS system

Metal-free activation of peroxymonosulfate by g-C3N4 under visible light irradiation for the degradation of organic dyes

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Application of a novel definitive screening design to in situ chemical oxidation of acid orange-II dye by a Co²⁺/PMS system

Metal-free activation of peroxymonosulfate by g-C₃N₄ under visible light irradiation for the degradation of organic dyes